From 3ec9c81e192df088726266162846f44e5f92d9b0 Mon Sep 17 00:00:00 2001
From: Athanasius <github@miggy.org>
Date: Tue, 19 Oct 2021 16:01:54 +0100
Subject: [PATCH] EDDN: Drop any 'unknown schema' messages so they're not
 retried

---
 plugins/eddn.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/plugins/eddn.py b/plugins/eddn.py
index 7e72aa0f..b4cd508d 100644
--- a/plugins/eddn.py
+++ b/plugins/eddn.py
@@ -298,7 +298,10 @@ Msg:\n{msg}'''
                 if unknown_schema := self.UNKNOWN_SCHEMA_RE.match(e.response.text):
                     logger.debug(f"EDDN doesn't (yet?) know about schema: {unknown_schema['schema_name']}"
                                  f"/{unknown_schema['schema_version']}")
-                    #  return  # Pretend it went OK so this message isn't retried
+                    # NB: This dropping is to cater for the time when EDDN
+                    #     doesn't *yet* support a new schema.
+                    self.replaylog.pop(0)  # Drop the message
+                    self.flush()  # Truncates the file, then writes the extant data
 
                 else:
                     status['text'] = self.http_error_to_log(e)